101 lines
2.2 KiB
C++
101 lines
2.2 KiB
C++
/*
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*
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* Copyright (C) 2002-2011, OFFIS e.V.
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* All rights reserved. See COPYRIGHT file for details.
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*
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* This software and supporting documentation were developed by
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*
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* OFFIS e.V.
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* R&D Division Health
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* Escherweg 2
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* D-26121 Oldenburg, Germany
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*
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*
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* Module: dcmimage
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*
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* Author: Marco Eichelberg
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*
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* Purpose: class DcmQuantIdent
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*
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*/
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#ifndef DIQTID_H
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#define DIQTID_H
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#include "dcmtk/config/osconfig.h"
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class DcmQuantPixel;
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/** pseudo error diffusion class implementing an identity transformation.
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* This class implements a public API mostly identical to that
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* of class DcmQuantFloydSteinberg.
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* Since several methods of the error diffusion class are called for each
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* single image pixel during conversion of a color image to palette color,
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* we do not use virtual methods and a common abstract base class here.
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* Instead we implement all methods inline, and use a template to select
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* the appropriate class at compile time. With a decent optimizer this
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* reduces the overhead for using this class to zero.
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*/
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class DCMTK_DCMIMAGE_EXPORT DcmQuantIdent
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{
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public:
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/// constructor
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DcmQuantIdent(unsigned long cols)
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: columns(cols)
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{
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}
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/// destructor
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~DcmQuantIdent()
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{
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}
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/// dummy method needed for API compatibility with DcmQuantFloydSteinberg
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inline void adjust(DcmQuantPixel&, long, long)
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{
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}
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/// dummy method needed for API compatibility with DcmQuantFloydSteinberg
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inline void propagate(const DcmQuantPixel&, const DcmQuantPixel&, long)
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{
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}
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/** starts a new row. The initial and last column of the current row are determined.
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* @param col initial column for the current row returned in this parameter
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* @param limitcol limit column (one past the last valid column) for the
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* current row returned in this parameter.
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*/
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inline void startRow(long& col, long& limitcol)
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{
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col = 0;
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limitcol = columns;
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}
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/// dummy method needed for API compatibility with DcmQuantFloydSteinberg
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inline void finishRow()
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{
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}
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/** increases the column number
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* @param col column number
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*/
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inline void nextCol(long& col) const
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{
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++col;
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}
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private:
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/// number of columns in image
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unsigned long columns;
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};
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#endif
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